Sweet potatoes can be grown on the Gotō Islands despite its lack of flat ground and abundance of barren slopes.
Additionally, there is little difference between a good and bad harvest, and they are resistant to damage from typhoons, eliminating the risk of famine.
These qualities have made sweet potatoes valued as a vital agriculture product supporting the economy of the Gotō Islands.
[4] Cultivation of sweet potatoes in Gotō would later slowly decline as their demand as an ingredient in shōchū and starch waned.
[5] However, many households still make kankoro mochi for the Japanese New Year to send to children and relatives who have left the islands.